MrGuest: (first post) Correct on all points, and an excellent summation
of this entire thread, and clear description of the reason for my first post.

Jibb: Yeah, I have GONE BACK to working with entities now. But I was HOPING
that terrains would be do-able, but at this point it looks like terrains are out.
So back to working with entities it is. I AM makeing progress with them.
But terrains would have required less 'messing about' than entities require.

MrGuest: (second post) Yeah, but BOTH HMP's and MDL's dont release ALL memory on removal.
Thats just how the engine works. And after a long discussion with JCL an age back,
it made sense how thats the only way it can work... Assuming I understood him correctly.